What is the purpose of the following segment?
	If ( !IsPostBack)
	{
	sqldataAdapter1.Fill (dsusers1);
	DataGrid1.DataBind ();
	}
a)	To populate the DataAdapter the first time the web page
id displayed.
b)	To populate the DataSet every time the web page is displayed.
c)	To populate the DataAdapter every time the web page is
displayed.
d)To populate the DataSet the first time the web page is
displayed.